Doctoral Dissertations

Date of Award


Degree Type


Degree Name

Doctor of Philosophy


Nuclear Engineering

Major Professor

Jamie Coble

Committee Members

J. Wesley Hines, Richard Wood, David Irick


Bearings are an essential component throughout most rotating equipment and power-generating systems. Current maintenance practices allow for premature replacement of bearings in a scheduled fashion. By moving to a condition-based maintenance strategy, the health of the component is assessed and used to determine the remaining useful life. This can improve plant safety and efficiency. My research focuses on vibration analysis and developing approximate entropy - a statistic that quantifies a signal's regularity and complexity - as a health indicator for bearings. Preliminary results show that this statistic has earlier fault detection and better trendability than other commonly-used features.

Files over 3MB may be slow to open. For best results, right-click and select "save as..."